Jump to content
SAU Community

Recommended Posts

  • Replies 52
  • Created
  • Last Reply

Top Posters In This Topic

i have a gtr33 vspec and want to install a microtech ltx12. if install can my 4wd still work , because the 4wd systems has it own computer. and operate from the main computer.

You are frigging crazy if your going to destroy such a nice car with a microtech. your driveability will go out the window.. sure you can still get heaps of power.. but it will drive like crap!

you can wire it up with the stock computer so it would work.. but the big question is.. why wouldnt you go for a PFC or something decent for such a nice car?

You are frigging crazy if your going to destroy such a nice car with a microtech. your driveability will go out the window.. sure you can still get heaps of power.. but it will drive like crap!

you can wire it up with the stock computer so it would work.. but the big question is.. why wouldnt you go for a PFC or something decent for such a nice car?

Amen to that. The problem with multiple throtlle bodies is that you have a very poor vacumm signal at low throttle angles which means you have to tune tps vs rpm based until you have enough vacumm on board so you can switch over to speed density based tuning. Dont defile your gtr by putting a microtech on it when a PFC has twice the features for less cost. If you do go map based then put an autronic SM4 on it and get it tuned by someone reputable.

Listen to these dudes mate. Ive had an LTX 12 running my R33gtr engine and it sucked sooooo bad. It didnt idle well at all and was a dog to drive. It was tuned by and apparent Microtech god (north of Sydney) and it was a complete waste of money (> $1200 for the tune i think). Ive since changed to an Autronic SM4 and its chalk and cheese compared to the Microtech. The difference really is unbelievable.

If you dont mind an AFM go the Power FC for ease of installation and tuning.

Microtechs work excellently on rotories but for some reason dont work well on piston engines (comparitavely).

Shaun.

You can get a microtech to work good on a piston engine but you wouldnt destroy a 32 33 34 gtr or gtst with one.

they have to be re tuned quarterly BUT they make big power.

If BIG power is all you want and you dont intent to drive your car around the streets the microtech may be the way to go..

Otherwise your wasting your time. get a jetro Power FC and be done with it.

Idiots.

Back that up.

Microtech is an awesome ECU. Ever run one??? Ever installed one???

I have done both. They are easy to install. They improved my response and driveability on BOTH my piston engines!

Dyno_001.jpg

SR20 making 158rkws on 9psi. Know many SR20's that do that? Look at the power curve. Does it look undriveable?

The computer is only as good as the tuner. If people have had dealings with useless tuners, don't blame the hardware.

Your advice is not helping this guy.

The best way for you to install is to run the stock computer. Makes cold start easier too.

That way the microtech just controlls, ignition and fuel. ofcourse it has the ability to control many other things. It will be easy to install, just get the pin out diagram, give it the TPS, water temp, CAS, then out puts to injectors and ignition modules, also its MAP sensor and thats about it.

It will drive on base map, go get it tuned. $300 for full tune at RX Engineering. don't know where u are tho...

Idiots.

Back that up.

Microtech is an awesome ECU. Ever run one??? Ever installed one???

I have done both. They are easy to install. They improved my response and driveability on BOTH my piston engines!

Dyno_001.jpg

SR20 making 158rkws on 9psi. Know many SR20's that do that? Look at the power curve. Does it look undriveable?

The computer is only as good as the tuner. If people have had dealings with useless tuners, don't blame the hardware.

Your advice is not helping this guy.

He asked for our advice. Ive had experience with the LTX12 on a 33gtr engine and it was terrible. I agree totally that a car is as good as the tuner, and guess who tuned my car mate. RX Engineering. I blame the computer (in relation to the application) AND the tuner. The whole exercise was extremely dissappointing and expensive!

Have you used an Autronic?

I laugh at your SR20 making 158kw. Surely its not in a Gazelle either!

Its an SR20, not an RB26

have you have expirience psybic with doing it to an RB26?

Its pretty much useless talking of your expirience with a single throttle bodied SR20 when the 6-throttle RB26 is whats being discussed

The best way for you to install is to run the stock computer. Makes cold start easier too.

That way the microtech just controlls, ignition and fuel. ofcourse it has the ability to control many other things. It will be easy to install, just get the pin out diagram, give it the TPS, water temp, CAS, then out puts to injectors and ignition modules, also its MAP sensor and thats about it.

It will drive on base map, go get it tuned. $300 for full tune at RX Engineering. don't know where u are tho...

You cant just splice into the loom and piggy back the ECT and TPS as the internal biasing of the standard ECU will be different to that of the microtech. That means you need an additional ECT sensor to be drilled and tapped somewhere.

By the way you cant show drivability on a dyno graph and if you've ever seen a scoped a microtech timing signal you would would not be very impressed with what you saw.

I have tuned a throttle/speed density based microtech on a GTIR (4 individual throttle bodies), I have also tuned the factory computer on a GTIR and there is no way I would recommend a lebotech on any thing with multiple throttle bodies.

Edited by rob82
Its an SR20, not an RB26

have you have expirience psybic with doing it to an RB26?

Its pretty much useless talking of your expirience with a single throttle bodied SR20 when the 6-throttle RB26 is whats being discussed

Nope. Still, closer talking about any turbo piston engine than stuff people think with no back up.

He asked for our advice. Ive had experience with the LTX12 on a 33gtr engine and it was terrible. I agree totally that a car is as good as the tuner, and guess who tuned my car mate. RX Engineering. I blame the computer (in relation to the application) AND the tuner. The whole exercise was extremely dissappointing and expensive!

Have you used an Autronic?

I laugh at your SR20 making 158kw. Surely its not in a Gazelle either!

Yes it is a gazelle, why wouldn't it be? Its only 158rwkw cause its only 9psi and its only 2.0L. the point was, that is good for that engine, and it was acheived with a microtech. You have seen them make more on less boost have you? Why do you laugh?

Sorry I used a dyno sheet to show responsiveness, it was the only thing I had to aid my argument. As that is no good, just trust me, my driveability is much better than it was before.

He actually DIDN'T ask what you thought of microtech, he DID ask about if 4WD would still work? Did anyone else talk about how to hook the microtech up so it would?

I can see this turning into a MAP vs MAF debate aswell as ECU wars. Why not stay on topic?? How to use the microtech so that the other computer controlled features remain.

I've driven an LTX12s GTR with 600+HP up and down the coast on a daily basis (not just around the block); it drove and idled perfectly with very good fuel economy and never missed a beat. Goes back to the saying that an ECU is only as good (or bad) as its tuner.

However, unless you are chasing huge power, I would recommend a power FC.

Whilst max power tunes i would expect work on any ecu, its the bits in the middle that count. how often would someone drive a street on max throttle from idle to redline over and over? its the bits in between that count

cold start

warm start

idle

low throttle response

light load + cruise

any ecu can make good max power, even a stock ecu remapped can

Because we have good plugin ECUs both MAF and MAP why wire an ECU when you have to piggy back or stuff around building TPS signal inverters for the 4WD.Horses for courses Wire ins are for cars that have no good plugin options. I dont know of any ECU that has to be retuned without any changes so the quaterly tune quote is not right.

i have a apexi power fc on the car at the moment with these mods ,

apexi fuel pump

hks gt2530 turbos

tomei 260 9.15 in and exhaust cams set a +2 IN & -4 EX

nismo fuel pressure regulator

standard injectors

THE CAR STILL FEEL THE SAME WITH THE NEW CAMS INSTALL .

if i change the injectors to 700cc can some one send me a mapping with fuel and ignition

SR20 making 158rkws on 9psi. Know many SR20's that do that? Look at the power curve. Does it look undriveable?

158kw from an sr20det at 9psi is nothing to write home about, i wouldn't attribute that to the tune either, you could tune it with any ecu and get that power figure, nothing special about the microtech

i've seen 175kw from an sr with a t28bb at 10psi with a powerfc, and it had a great torque curve.

I disagree that any aftermarket ecu has a "flaw" that makes it idle like crap, or run poorly. You'll probably find it's installed incorrectly or tuned incorrectly or one of the engines sensors is broke.

there is logic to the multiple throttle bodies argument, and perhaps a map sensor based ecu could be the cause of ecu non-suitability. i mean the only person who is supporting Microtech hasn't used them on an rb26....

Microtechs are not such a bad ecu. My issues with them compared to a PFC is.

Map sensor - does not drive on the street like a power fc or a quality ECU (Autronic or Motec)

Lack of knock sensor monitoring

Microtechs are good for wankels or a FJ20 / whatever any type of older engine that you want to through them at.

When you start getting into RB25DET's RB26DET's or any newish engine a microtech can destroy the way the car drives.

Has anyone tried to tune a Microtech ?? they are SOOO easy to tune its not funny I can tune one easily on the street and it would be even quicker on a dyno. Tuning a PFC is much harder.

I noticed with the microtech that you cant get the AF ratios spot on 100% of the time like you can with a power FC on cruise - you can get them close and close is good enough in most cases but with a Power FC you can be pretty sure that your going to get the same AF ratio on the same load point time after time (as long as everything else is the same fuel / air temp etc etc)

I would suggest anyone who has a skyline above a r31 should go for a Power FC and stick with the AFM. I run a Q45 90mm AFM.

My opinion is that the AFM will allways sense map position better then a map sensor for the main reason that all the air must travel through the AFM and its read before even going into the turbo.

The map sensor uses a really small line that only senses pressure in the line so how long does it take for the computer to get the right signal ?? wouldnt it be a little lagged ???

Just does not feel as safe to me (IMHO its MY opinion) to rely on such a small line to run your engine - this would be the reason why the microtechs dont run as good as the Power FC on the street in cruise as it does not get the correct signal in time ???

Anyway whatever you choose.. Go the Power FC.

i have a apexi power fc on the car at the moment with these mods ,

apexi fuel pump

hks gt2530 turbos

tomei 260 9.15 in and exhaust cams set a +2 IN & -4 EX

nismo fuel pressure regulator

standard injectors

THE CAR STILL FEEL THE SAME WITH THE NEW CAMS INSTALL .

if i change the injectors to 700cc can some one send me a mapping with fuel and ignition

So your only wanting to use a microtech because you dont "feel" a difference after changing camshafts?

:)

golly gosh.

Was there a power band shift before/after?

You really need injectors to make the most of what 2530's have to offer. They go far beyond what the stock items can supply in terms of fuel.

Your probably only running 16-17psi?

So your only wanting to use a microtech because you dont "feel" a difference after changing camshafts?

:)

golly gosh.

Was there a power band shift before/after?

You really need injectors to make the most of what 2530's have to offer. They go far beyond what the stock items can supply in terms of fuel.

Your probably only running 16-17psi?

Woah, now I'm lost.

My point before was that the guy asked if you could still stock ECU features with microtech, then everyone arked up about how shit microtech was, even though it was so not the time.

Why you would get rid of a power fc for a microtech... i'm not so sure on that one....

anyway, i still think i came closest to answering the initial question of how to hook up a microtech so 4ws and shit still works.... lol

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now



  • Similar Content

  • Latest Posts

    • Seat of the pants assessment of the new intake: The car is way less "doughy" when hitting the loud pedal, especially off idle when stopped or in traffic, I did use a cheapo lazer thermal thingo to measure the temp around where the pod filter got its air, it was between 55 - 60°C, in saying this the car was shut off and not moving, so the OEM intake pipe was not supplying any fresh air to where the pod was when the car was at least moving A weird bonus was induction noise on the throttle in the cabin increased a bit,  I was worried that I was actually going to lose some of that induction noise I love so much, outside though, when I got the daughter to do a WOT drive by pass for me, the induction noise has increased alot when on the throttle, not quite ITB doort, but well up there I'm extremely happy with the results and have been exploring the country roads in the region  As for house mods: 1.New front fence is up and is awesome, it really upgraded how the joint looks from the street, and the added security is nice 2. Electricians have replace some interior lights, and with more lighting in the garage, a few new motion detecting lights out the front above the garage, front room, and at the front door, which I have already found heaps helpful coming and going, also now has fancy pants CCTV all round the house The only hold point for power though is the solar and batteries due to supply issues, although this will happen over the next few weeks 3. I have done a heap of landscaping out the front and I'm almost ready to do a new small retaining wall with some nice blocks to replace the brick and cemented in rocks around the raised garden beds cemented in river stone "was the fashion at the time" the house was built. I currently have a pallet of retaining wall blocks and 2 bulka bags of 20mm blue metal to replace the wood chip that is in the raised garden beds around the house 4. I now have 3 big raised garden beds for out the back to grow some vegetables, about 70cm high, 200cm long and 100cm wide 5. My 2 compost bins are already pretty full with brown, green and kitchen waste from the landscaping I'vedone so far, but they will probably take a few months to break down, so anything else that gets chopped, trimmed, and kitchen waste will just start filling the base of the raised garden beds to about 30cm before I start throwing 40cm of good compost, and stuff, for the vegetables to grow in, I'll need a few ton of compost and soil, but the local supplier can sent me bulka bags of the stuff Basically the logs, wood chips and a few strategically placed rocks for drainage, will give the beds some good organic materials down low to break down over time, and they will hold moisture during the warmer months to save the water in my big arse water tank if we don't get alot of rain So, all in all, the car and house mods are going well, and I'm really enjoying being retired, I sleep in too 0700 and slowly plod around inside until I feel like actually doing anything, and only work in the yard for as long as want, which has actually been alot over the last few weeks,  although when you look at it, it seems that not a huge amount of work has been done,  until I look at the before I started the work pics Happy days and good times indeed 
    • hahaha yeah. Plan is to get side skirts and probably just rear pods. But going to do them one-by-one. I've got a set that I really like from RHDJapen, but that one isn't shipped to AU. So need to find someone who can get it for me
    • Here's an idea, answer the questions I asked you as they are trying to work out WHY the LSD will be binding up in a straight line.
    • You haven't driven many modern cars then have you? Most of them have sfa steering feel with their stupid electric bullshit steering systems.
×
×
  • Create New...